Update melange convert python to have tests and produce subpackages for each python version.

[justinvreeland]

Melange Pull Request Template

Functional Changes

• This change can build all of Wolfi without errors (describe results in notes)

Notes:

I have not tried to build all of Wolfi but this change shouldn't effect builds and the packages I have built with these changes build correctly. Including the results from the convert changes. (Though some python packages need some changes because they produce binaries or need C extensions built or something)

Additional Notes:

The pipeline that this convert script uses is in Wolfi's repo not this one. I'm not sure why that is but I'm happy to add it to this PR if that's desired.

This hardcodes python3.{10,11,12} for use in the generated yaml, it is not ideal but it would be nice if it was more configurable. Different melange users might want to specify a different python versions in particular I might want to have a file in Wolfi that specifies the supported python3 versions and reads that to generate the range if that file is found instead of using the the hardcoded set but my brief look at melange didn't find anything similar to model it off of.

[pnasrat]

It'd be helpful if you attached the output of a run of convert python with this in the PR for reference.

I'm also wondering if we should be doing this through a go template - see

melange/pkg/build/package.go

Line 147 in 1868224

var controlTemplate = `# Generated by melange

for an example to potentially support external templates. That might be a future change as I'm guessing the different versions of generate don't have a consistent struct that could be rendered.

[justinvreeland]

It'd be helpful if you attached the output of a run of convert python with this in the PR for reference.

Will do.

I'm also wondering if we should be doing this through a go template - see

melange/pkg/build/package.go

Line 147 in 1868224

var controlTemplate = `# Generated by melange

for an example to potentially support external templates. That might be a future change as I'm guessing the different versions of generate don't have a consistent struct that could be rendered.

Certainly something to look into for future changes for sure. I hadn't noticed that when I was looking through things.

[justinvreeland]

# Generated from https://pypi.org/project/packaging/
package:
  name: py3-packaging
  version: "24.1"
  epoch: 0
  description: Core utilities for Python packages
  copyright:
    - license: ""
  dependencies:
    provider-priority: "0"

environment:
  contents:
    packages:
      - build-base
      - busybox
      - ca-certificates-bundle
      - flit-core
      - py3-supported-pip
      - wolfi-base

pipeline:
  - uses: git-checkout
    with:
      expected-commit: 85442b8032cb7bae72866dfd7782234a98dd2fb7
      repository: https://github.com/pypa/packaging
      tag: v${{package.version}}

subpackages:
  - range: py-versions
    name: py${{range.key}}-${{vars.pypi-package}}
    pipeline:
      - name: Python Build
        uses: py/pip-build-install
        with:
          python: python${{range.key}}
    dependencies:
      provides:
        - py3-${{vars.pypi-package}}
      provider-priority: ${{range.value}}
    test:
      environment: {}
      pipeline:
        - name: Import Test
          uses: python/import
          with:
            import: ${{vars.module_name}}
            python: python${{range.key}}

data:
  - name: py-versions
    items:
      "3.10": "310"
      "3.11": "311"
      "3.12": "312"

update:
  enabled: true
  manual: false
  github:
    identifier: pypa/packaging

vars:
  module_name: packaging
  pypi-package: packaging

test:
  environment: {}
  pipeline:
    - name: Import Test
      uses: python/import
      with:
        import: ${{vars.module_name}}

[pnasrat]

LGTM

I would also want @jonjohnsonjr to review and approve

needs work

[smoser]

This is way helpful. some things I noticed yesterday that I'd like to have (one from justin)

1. it'd be nice to have the build-deps figured out (adding hatchling or what not when necessary)
2. at this point we should use either py3-supported-build-base or py3-supported-build-base-dev packages in environment.contents.packages
3. for things with a '-bin' we need the "move" and '-bin' subpackage. not sure how to do that
4. add python 3.13 at this point.
5. I had not seen your 'module_name' and did loads of multi-version with 'import' as the name. yours is probably better, but if we do that we should go and sweep replace.

[smoser]

1. it'd be nice to have the build-deps figured out (adding hatchling or what not when necessary)

@pnasrat pointed out that this is probably more work than it is worth at this point.

[justinvreeland]

• for things with a '-bin' we need the "move" and '-bin' subpackage. not sure how to do that

Initially I thought maybe we'd have to build it to do this. But we could probably download the actual artifact and tar tf it to see if it generates a bin.

at this point we should use either py3-supported-build-base or py3-supported-build-base-dev packages in environment.contents.packages

This is super easy I can add that no problem

add python 3.13 at this point.

ditto